Purpose Of Alarm Check Valve

Above picture shows a swing ch.

Purpose of alarm check valve. Viking sprinkler 64 418 views. Meanwhile in the event of variable pressure condition false alarm is prevented with provision of retard chamber at the external bypass. Alarm check valve is core element in wet pipe fire sprinkler systems. Viking wet pipe alarm check valve system system reset procedure duration.

The alarm port can be used to direct water to a water motor alarm or an alarm pressure switch used to alert nearby personnel to the system s activation or send a signal to a fire alarm control panel. Once the alarm check valves are activated they will allow water to flow through the system engaging the sprinkler system as and where needed in order to suppress a potential fire. A check valve clack valve non return valve reflux valve retention valve or one way valve is a valve that normally allows fluid liquid or gas to flow through it in only one direction. It serves a dual purpose which prevents a reverse flow of water non return also provides for the use of the water motor gong.

Under normal circumstances the clapper of the valve is. A swing check valve can act as an alarm check valve for a wet pipe fire sprinkler system but only when that valve can sound an alarm. An alarm check valve is basically a check valve with an alarm port. A check valve with a high cv in a low flow application is doomed from the start.

When backflow occurs it closes itself. Check valve allows flow only in one direction i e. In a short period of time it will fail no matter what extraneous engineering feats were used to make it tougher unfortunately the installed check valve is blamed for the failure when in reality the culprit was the application. There are various types of check valves used in a wide variety of.

External bypass prevents false alarm under all supply pressure condition. The valve should if properly maintained help hold the system pressure steady and reduce the possibility of false alarms. The wet alarm valve is designed for applications where the water is unlikely to freeze. The main purpose of the alarm check valve is to ring a mechanical bell called a water motor gong.

Either manually when a person activates a water gong or electronically. The water staying pressurized in the pipes is released over the fire area after the sprinkler is activated. An alarm check valve can be activated or opened in one of two basic ways. This valve does not require any force to open and close it uses line pressure for opening and closing.

Check valves are two port valves meaning they have two openings in the body one for fluid to enter and the other for fluid to leave.